Wandering traders can no longer be made completely invisible during the day

Prior to 26.3 pre-release 1, wandering traders could be made completely invisible during the day by giving them invisibility, then removing the item from their mainhand every tick. That is no longer possible as the milk bucket in their hand is now always visible, regardless of it being removed by a command or not.

Steps to reproduce:

• Set it to day: /time set day

• Setup a repeating command block containing the command: /item replace entity @n[type=minecraft:wandering_trader] weapon.mainhand with air

• Summon a wandering trader: /summon minecraft:wandering_trader

• Give them infinite invisibility: /effect give @n[type=minecraft:wandering_trader] minecraft:invisibility infinite 0 true

• Activate the repeating command block before the trader finishes drinking

Expected result: The wandering trader is completely invisible, with the milk bucket not visible.

Actual result: The milk bucket is still visible, despite being removed every tick